Toshiba Semiconductor and Storage DF5A5.6LFU(TE85L,F

Overview

DF5A5.6LFU from TOSHIBA is a quad-channel ESD protection diode array designed for high-speed data lines in portable electronics, featuring 5.6 V nominal Zener voltage, 8.0 pF typical terminal capacitance, ±8 kV IEC61000-4-2 contact discharge immunity, and ultra-compact 1-2V1B package. It serves as a transient voltage suppressor on USB, HDMI, or audio interface signal paths.

For engineers reviewing the DF5A5.6LFU datasheet, DF5A5.6LFU pinout, DF5A5.6LFU application, or DF5A5.6LFU equivalent, key selection criteria include low-capacitance ESD clamping performance, multi-line integration in space-constrained layouts, and compliance with IEC61000-4-2 Level 4 requirements for consumer-grade interfaces.

Technical Context

This device implements four independent Zener-based ESD clamps in a single surface-mount package, each with cathode-anode configuration optimized for bidirectional transient suppression. Its low 8.0 pF capacitance ensures minimal signal integrity impact on 100+ Mbps digital interfaces.

The DF5A5.6LFU operates exclusively as an ESD protection element - not as a voltage regulator or constant-voltage reference - with guaranteed clamping behavior only under transient conditions per IEC61000-4-2 testing at ±8 kV contact discharge.

Key Specifications

Pinout & Package

Package: 5-pin SOT-353 (JEDEC-compatible), marking code "AU", Toshiba designation 1-2V1B, dimensions 2.1 × 1.35 × 0.9 mm (L × W × H), weight 0.0062 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ESD protection applications.

Compared with NUP4201MR6T1G, DF5A5.6LFU reduces BOM count and layout area by 75%; versus ESDE05C1-2UTR, it trades 2.5 pF lower capacitance for broader voltage tolerance (±0.4 V vs. ±0.25 V) and established field reliability since 2003.

Availability

DF5A5.6LFU is available at Aetrix Electronics and suitable for USB interface protection, HDMI hot-plug detection, stereo audio jack safeguarding, and smartphone flex cable ESD hardening requiring stable component supply across high-volume consumer electronics production.

Supply support for DF5A5.6LFU includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Toshiba Electronic Devices & Storage Corporation designs and manufactures semiconductor components focused on power efficiency, miniaturization, and reliability for consumer, industrial, and automotive systems.

The DF5A5.6LFU belongs to Toshiba's DF-series ESD protection diode family, engineered specifically for space-constrained, high-speed interface protection in portable electronics where low capacitance and multi-line integration are critical.

FAQ

What is the primary function of the DF5A5.6LFU?

The DF5A5.6LFU is a quad-channel ESD protection diode array designed exclusively for electrostatic discharge suppression on high-speed signal lines. It is not intended for voltage regulation or continuous power dissipation. Each channel features a Zener-based clamp with 5.6 V nominal breakdown voltage, and the device achieves ±8 kV IEC61000-4-2 contact discharge immunity. DF5A5.6LFU must be used strictly within its specified absolute maximum ratings, including 200 mW power dissipation and 125 °C junction temperature limit.

Can the DF5A5.6LFU be used as a Zener voltage reference?

No, the DF5A5.6LFU is explicitly designated by Toshiba for ESD protection only and is not characterized or guaranteed for use as a voltage reference or constant-voltage diode. Its Zener voltage specification (5.3–6.0 V) applies only under transient ESD conditions at I_Z = 5 mA, and its dynamic impedance (≤50 Ω) and reverse leakage (≤1.0 μA at 3.5 V) are not stabilized for precision reference applications. DF5A5.6LFU lacks long-term stability, temperature coefficient, and tolerance specifications required for reference use.

What does the "AU" marking on the DF5A5.6LFU indicate?

"AU" is the top-side laser marking code for the DF5A5.6LFU, uniquely identifying this specific Toshiba part number and manufacturing lot. It corresponds to the 1-2V1B package variant and confirms compliance with Toshiba's standard ESD test protocols and material composition (e.g., RoHS-compliant terminations). The marking is visible under 20× magnification and aligns with JEITA ED-4701 standards for semiconductor identification. DF5A5.6LFU units without "AU" marking are not authentic Toshiba products.

How should the common anode (Pin 2) of the DF5A5.6LFU be connected?

Pin 2 (Anode) of the DF5A5.6LFU must be connected directly to a low-impedance system ground plane - not through resistors, ferrites, or shared return traces - to ensure effective ESD current shunting. Any added impedance degrades clamping performance and may cause voltage overshoot exceeding protected IC tolerances. Layout best practice requires a dedicated thermal via under Pin 2 and minimum 0.5 mm wide ground trace. DF5A5.6LFU's 200 mW power rating assumes optimal thermal conduction via this connection.

Is the DF5A5.6LFU suitable for automotive applications?

No, the DF5A5.6LFU is not qualified for automotive use. Toshiba explicitly restricts its application to consumer and industrial portable electronics, excluding equipment requiring extraordinarily high reliability - including automotive ECUs, ADAS sensors, or infotainment head units. The device lacks AEC-Q200 qualification, has no guaranteed operation beyond 125 °C junction temperature, and is not screened for extended temperature cycling or vibration endurance. DF5A5.6LFU is rated only for commercial/industrial ambient conditions per its storage range (−55 to +125 °C).